package co.yiiu.core.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.hibernate.criterion.Example;

public class HttpUtils {
    /**
     * get请求
     * @return
     */
    public static String doGet(String url) throws Exception {
            HttpClient client = new DefaultHttpClient();
            //发送get请求
            HttpGet request = new HttpGet(url);
            HttpResponse response = client.execute(request);

            /**请求发送成功，并得到响应**/
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                /**读取服务器返回过来的json字符串数据**/
                String strResult = EntityUtils.toString(response.getEntity());
                return strResult;
            }
            return null;
    }

    /**
     * post请求(用于key-value格式的参数)
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, Map params) throws  Exception{

        BufferedReader in = null;
        // 定义HttpClient
        HttpClient client = new DefaultHttpClient();
        // 实例化HTTP方法
        HttpPost request = new HttpPost();
        request.setURI(new URI(url));
        //设置参数
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        for (Iterator iter = params.keySet().iterator(); iter.hasNext();) {
            String name = (String) iter.next();
            String value = String.valueOf(params.get(name));
            nvps.add(new BasicNameValuePair(name, value));

            //System.out.println(name +"-"+value);
        }
        request.setEntity(new UrlEncodedFormEntity(nvps,HTTP.UTF_8));

        HttpResponse response = client.execute(request);
        int code = response.getStatusLine().getStatusCode();
        if(code == 200){    //请求成功
            in = new BufferedReader(new InputStreamReader(response.getEntity()
                    .getContent(),"utf-8"));
            StringBuffer sb = new StringBuffer("");
            String line = "";
            String NL = System.getProperty("line.separator");
            while ((line = in.readLine()) != null) {
                sb.append(line + NL);
            }

            in.close();

            return sb.toString();
        }
        else{   //
            return null;
        }
    }

    /**
     * post请求（用于请求json格式的参数）
     * @param url
     * @param params
     * @return
     */
//    public static String doPost(String url, String params) throws Exception {
//
//        CloseableHttpClient httpclient = HttpClients.createDefault();
//        HttpPost httpPost = new HttpPost(url);// 创建httpPost
//        httpPost.setHeader("Accept", "application/json");
//        httpPost.setHeader("Content-Type", "application/json");
//        String charSet = "UTF-8";
//        StringEntity entity = new StringEntity(params, charSet);
//        httpPost.setEntity(entity);
//        CloseableHttpResponse response = null;
//
//        try {
//            response = httpclient.execute(httpPost);
//            StatusLine status = response.getStatusLine();
//            int state = status.getStatusCode();
//            if (state == HttpStatus.SC_OK) {
//                HttpEntity responseEntity = response.getEntity();
//                String jsonString = EntityUtils.toString(responseEntity);
//                return jsonString;
//            }
//            else{
//                logger.error("请求返回:"+state+"("+url+")");
//            }
//        }
//        finally {
//            if (response != null) {
//                try {
//                    response.close();
//                } catch (IOException e) {
//                    e.printStackTrace();
//                }
//            }
//            try {
//                httpclient.close();
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
//        return null;
//    }
}
